Permanent mold.



J. A. HARDIN.

PERMANENT MOLD.

APPLICATION FILED OCT. 28, 1911.

Patented Mar. 5, 1912;

2 SHEETS-SHEET 1'.

WITNESSES: [NVENTOR efiaseyvlz A Hardin.

/l//01 m v J; A. HARDIN.

PERMANENT MOLD.

APPLICATION FILED OCT. 28, 1911.

1,01 9,248. Patented Mar. 5, 1912.

2 SHEETS-SHEET 2.

ZMM

i UNITED STATES PATENT OFFICE.

JOSEPH ALBERT HARDIN, F ANNISTON, ALABAMA, ASSIGNOR TO INTERSTATE ROOF- ING & FOUNDRY COMPANY, OF ANNISTON, ALABAMA, A

BAMA.

oonrom'rron or ALA- PERMANEN'I. MOLD.

To all whom it may concern:

Be'it known that I, Josnrn ALBERT HAR- DIN, a citizen of the United States of America, residing at Ann iston, in the county of Calhoun and State of Alabama, have invented certain new and useful Improve- I ments in Permanent Molds, of which the following is a specification.

My invention relates to an improved means for molding andirons and other like castings in a permanent mold instead of by means of sand molds, whereby I greatly reduce the cost of production of such articles principally by reason of the fact that the permanent or chill molds can be operated by common labor while sand molding requires I skilled labor.

My invention has a particular advantage in the manufacture of andirons, fire. dogs,

and like shapes of castings in that it is possible to make them in one piece and substantially free from sand or,blow-holes, produc- I ing clean-and sharp castings and avoiding the expense of rattling same.

One feature of my present invention resides in the provision of means to properly center the two sections of the cope which contain the mold cavity for one portion of thecasting. I

Another feature of my invention the novel arrangement of gating the mold, which consists in forming a separate gate in the cope which connects w1th the mold cavity in the co e and does not discharge the metal directly-into the. mold cavity in the drag, which would result in burning the embodiments are illustrated in the panying'drawings, wherein i mold and disfiguring the casting.

In accordance w1th the requirements of law, I have illustrated whatI regard as thepreferred embodiment of my invention, but I do-not desire to be limited thereto. These accom- Figure 1 presents a plan view of the permanent mold with the cope sections opened out in a horizontal plane. Fig. 2 is-a side elevation of. thefermanent mold in assembled position, an Fig. 3 is an end-elevation of Fig. 2. Fig. 4 is a side elevation of the permanent mold with a modified arrangement for dividing the cope.

Similar reference numerals refer to similar parts throughout the drawings.

According to the illustrations, my apparatus comprises a metallic base plate or drag 1 p Specification of Letters Patent.

nection with which I have-illustrated my in-v vention.

Referring to Figs. 1 to 3, I illustrate. the cope as formed of two sections 3 and 4 which equally divide the cope in a vertical longitu-- dinal plane taken centrally through the mold cavity 2 in the drag and each of these cope sections are shown provided 'with flanges 5which are formed integralther'ewith or attached thereto by cap screws. Each of these-flanges 5 is provided with an eye at its lower end to receive a pivot bolt 6, one of Patented Mar. 5, 1912. Application filed October 28, 1911. Serial No. 657,322.

which is disposed along each side of the drag with its center line level with the top face of the drag. The bolts 6 pass through 1 lugs 7 which are formed integral with or bolted to the sides of the drag and are provided at their upper ends with openings for the pivot bolt 6. On the cope section 3 there. is a lug or projection 8 at itsleft hand end (Fig. 2), and its right hand end is provided with a cover plate 9 which is adapted to cover the portion of the drag not covered by the cope sections 3 and 4, it being noted, in view of the relatively small size of the shank to be molded in thevco e, these sections are made smaller than the a'g. Portions 8 and 9, carried by the cope sections 3, receive be.

tween them the cope section 4 and accurately centers the cope sectlons 1n proper relationship in which they are adapted to be locked.

by the bail 10 which is pivoted. to the section 3 and adapted to swing over the curved top portions of the cope sections 3 and 4 and to engage the taperi wall of section 4. The cope sections 3 an 4' between them form a mold cavity 11 in which the shank of the andirons is cast. I have shown each cope section provided with an oppositely, disposed portion of the mold cavity 11, the lower end of which cavity, when the cope is in operating position, stands above the central portion 12 of the mold cavity .2. The top portion of 11 is angled ofi at'13 to rovide for the inner 'leg or the shank of t e andiron. The metal is-adapted .to be introduced into the permanent mold in: any suitable manner for best distributing it throughout the angularly disposed portions of'the complete mold.

I have shown thejcope sectionscut away at 14 to form a pouring opening I; pour metal into the gate which has a,

branch lfi leading tothe mold 11 while the lower end .of the gate 15 delivers the metal to a gate 17 formed in the drag and'leading.

to the portion 12 of the mold cavity therein.

Other arrangements for gating the apparatus may be used if desired, but I have found this to be the most practical way since'the molten metal as it is poured into the mold will not fall' directly into the mold cavity in the drag'but instead will fall into the groove or channel 17 which leads into the-mold cavity 12'. .By this means I prevent the molten metalfrom burning the mold proper and disfiguring the ornamental face of the castmg. In Fig. l the drag 1 is equipped at its ends with bearing flanges 18 for the pivQot portion of the mold 24', forming the'inner.

leg ofthe shank, is struck on an are from theadjacent pin '19 as a center, to permit the cope section 20 to swing" freely on its hinges in clearing the finished casting. -In this construction, if desired, the pouring can be effected through gate 25. If deslred the *mold'bav'ity in the copesection 24 may be vented through a curved vent opening 25}? which is struck on" an arc from the pivot point of the cope section so' thatj the metal therein will not interfere with the opening up of the cope sections. These are held together by a loop 10 similar to'the loop 10,

and; are held against lateral displacement by side lugs 5".

In operation, the mold'is assembled and looked, as shown inFigs. 2 and 3, and metal is poured through the gate 14 and flowing through the gates, 15, 16 and 17 enters the -mold cavity at different-points and fills same to form an inte ral andiron or fire dog. The 'metal mol chills the casting qulckly, leaving it'clean and free of blowholes. The ball is thrown back a) unlock the cope sections, which,byreason of the manner inwhichthey are attached to the I drag, will move outwardly without binding in the casting,- leaving the shank of the latter standing clear with the integral front of the andiron in the mold cavity 2 in the drag. As 'soon as the casting has been removed and the cope sections againclamped together, the mold is' ready for another pouring and may be used in this manner continuously to produce the most marked improvement in the economical production of andirons and like articles. L As hereinbefore stated the cope sections may be'attached to the drag in any other suitable manner to give them the proper relative movement for the casting in the mold. Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is 1. In a permanent mold, adrag having a mold cavity formed therein, a multi-parted cope adjustably attached to the drag,'there being a mold cavity formedwholly in the cope and between the parts thereof which coincides w'itha mold cavity formed be- ;tween the cope and drag, means to connect the cope sections to the drag, to adapt them to swing'clear of the finished casting, and a gate for the molten metal formed partly in the cope and partly in "the drag, substantially as described.

2. A permanent'mold comprising a drag, a sectional cope,--there being ajhorizontal cavity in the cope, thecop'e sections being parted in a planeintersecting the .vertical cavity, means to hinge the cope sections to v the drag at points where said sections will 1 swing clear of the castings when swung outwardly on theirhinges and agate formed in the cope and connected by a branch passage with the upper end of the mold cavity in the cope, said gate terminating in a channel formed in the drag and leading to. the mold cavity therein, substantially as described.

In testimony whereof Iaflix my signature in presenceof two witnesses.

Witnesses z,

C. G. WILLIS, G. G. BRITTON.

v mold cavity in the drag'and avertical mold i JOSEPH AL ERT HARDIN; a 

